disk-utils/fdisk-menu.c

   1
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <ctype.h>
   6 #include <stdint.h>
   7
   8 #include "c.h"
   9 #include "fdisk.h"
  10 #include "pt-sun.h"
  11 #include "pt-mbr.h"
  12
  13 struct menu_entry {
  14         const char      key;                    /* command key */
  15         const char      *title;                 /* help string */
  16         unsigned int    normal : 1,             /* normal mode */
  17                         expert : 1,             /* expert mode */
  18                         hidden : 1;             /* be sensitive for this key,
  19                                                    but don't print it in help */
  20
  21         enum fdisk_labeltype    label;          /* only for this label */
  22         enum fdisk_labeltype    exclude;        /* all labels except this */
  23         enum fdisk_labeltype    parent;         /* for nested PT */
  24 };
  25
  26 #define IS_MENU_SEP(e)  ((e)->key == '-')
  27 #define IS_MENU_HID(e)  ((e)->hidden)
  28
  29 struct menu {
  30         enum fdisk_labeltype    label;          /* only for this label */
  31         enum fdisk_labeltype    exclude;        /* all labels except this */
  32
  33         unsigned int            nonested : 1;   /* don't make this menu active in nested PT */
  34
  35         int (*callback)(struct fdisk_context **,
  36                         const struct menu *,
  37                         const struct menu_entry *);
  38
  39         struct menu_entry       entries[];      /* NULL terminated array */
  40 };
  41
  42 struct menu_context {
  43         size_t          menu_idx;               /* the current menu */
  44         size_t          entry_idx;              /* index with in the current menu */
  45 };
  46
  47 #define MENU_CXT_EMPTY  { 0, 0 }
  48 #define DECLARE_MENU_CB(x) \
  49         static int x(struct fdisk_context **, \
  50                      const struct menu *, \
  51                      const struct menu_entry *)
  52
  53 DECLARE_MENU_CB(gpt_menu_cb);
  54 DECLARE_MENU_CB(sun_menu_cb);
  55 DECLARE_MENU_CB(sgi_menu_cb);
  56 DECLARE_MENU_CB(geo_menu_cb);
  57 DECLARE_MENU_CB(dos_menu_cb);
  58 DECLARE_MENU_CB(bsd_menu_cb);
  59 DECLARE_MENU_CB(createlabel_menu_cb);
  60 DECLARE_MENU_CB(generic_menu_cb);
  61
  62 /*
  63  * Menu entry macros:
  64  *      MENU_X*    expert mode only
  65  *      MENU_B*    both -- expert + normal mode
  66  *
  67  *      *_E  exclude this label
  68  *      *_H  hidden
  69  *      *_L  only for this label
  70  */
  71
  72 /* separator */
  73 #define MENU_SEP(t)             { .title = t, .key = '-', .normal = 1 }
  74 #define MENU_XSEP(t)            { .title = t, .key = '-', .expert = 1 }
  75 #define MENU_BSEP(t)            { .title = t, .key = '-', .expert = 1, .normal = 1 }
  76
  77 /* entry */
  78 #define MENU_ENT(k, t)          { .title = t, .key = k, .normal = 1 }
  79 #define MENU_ENT_E(k, t, l)     { .title = t, .key = k, .normal = 1, .exclude = l }
  80 #define MENU_ENT_L(k, t, l)     { .title = t, .key = k, .normal = 1, .label = l }
  81
  82 #define MENU_XENT(k, t)         { .title = t, .key = k, .expert = 1 }
  83 #define MENU_XENT_H(k, t)       { .title = t, .key = k, .expert = 1, .hidden = 1 }
  84
  85 #define MENU_BENT(k, t)         { .title = t, .key = k, .expert = 1, .normal = 1 }
  86 #define MENU_BENT_E(k, t, l)    { .title = t, .key = k, .expert = 1, .normal = 1, .exclude = l }
  87
  88 #define MENU_ENT_NEST(k, t, l, p)       { .title = t, .key = k, .normal = 1, .label = l, .parent = p }
  89 #define MENU_XENT_NEST(k, t, l, p)      { .title = t, .key = k, .expert = 1, .label = l, .parent = p }
  90
  91 /* Generic menu */
  92 struct menu menu_generic = {
  93         .callback       = generic_menu_cb,
  94         .entries        = {
  95                 MENU_BSEP(N_("Generic")),
  96                 MENU_ENT  ('d', N_("delete a partition")),
  97                 MENU_ENT  ('l', N_("list known partition types")),
  98                 MENU_ENT  ('n', N_("add a new partition")),
  99                 MENU_BENT ('p', N_("print the partition table")),
 100                 MENU_ENT  ('t', N_("change a partition type")),
 101                 MENU_BENT_E('v', N_("verify the partition table"), FDISK_DISKLABEL_BSD),
 102
 103                 MENU_XENT('d', N_("print the raw data of the first sector from the device")),
 104                 MENU_XENT('D', N_("print the raw data of the disklabel from the device")),
 105                 MENU_XENT('f', N_("fix partitions order")),
 106
 107                 MENU_SEP(N_("Misc")),
 108                 MENU_BENT ('m', N_("print this menu")),
 109                 MENU_ENT_E('u', N_("change display/entry units"), FDISK_DISKLABEL_GPT),
 110                 MENU_ENT_E('x', N_("extra functionality (experts only)"), FDISK_DISKLABEL_BSD),
 111
 112                 MENU_BSEP(N_("Save & Exit")),
 113                 MENU_ENT_E('w', N_("write table to disk and exit"), FDISK_DISKLABEL_BSD),
 114                 MENU_ENT_L('w', N_("write table to disk"), FDISK_DISKLABEL_BSD),
 115                 MENU_BENT ('q', N_("quit without saving changes")),
 116                 MENU_XENT ('r', N_("return to main menu")),
 117
 118                 MENU_ENT_NEST('r', N_("return from BSD to DOS"), FDISK_DISKLABEL_BSD, FDISK_DISKLABEL_DOS),
 119
 120                 { 0, NULL }
 121         }
 122 };
 123
 124 struct menu menu_createlabel = {
 125         .callback = createlabel_menu_cb,
 126         .exclude = FDISK_DISKLABEL_BSD,
 127         .nonested = 1,
 128         .entries = {
 129                 MENU_SEP(N_("Create a new label")),
 130                 MENU_ENT('g', N_("create a new empty GPT partition table")),
 131                 MENU_ENT('G', N_("create a new empty SGI (IRIX) partition table")),
 132                 MENU_ENT('o', N_("create a new empty DOS partition table")),
 133                 MENU_ENT('s', N_("create a new empty Sun partition table")),
 134
 135                 /* backward compatibility -- be sensitive to 'g', but don't
 136                  * print it in the expert menu */
 137                 MENU_XENT_H('g', N_("create an IRIX (SGI) partition table")),
 138                 { 0, NULL }
 139         }
 140 };
 141
 142 struct menu menu_geo = {
 143         .callback = geo_menu_cb,
 144         .exclude = FDISK_DISKLABEL_GPT | FDISK_DISKLABEL_BSD,
 145         .entries = {
 146                 MENU_XSEP(N_("Geometry")),
 147                 MENU_XENT('c', N_("change number of cylinders")),
 148                 MENU_XENT('h', N_("change number of heads")),
 149                 MENU_XENT('s', N_("change number of sectors/track")),
 150                 { 0, NULL }
 151         }
 152 };
 153
 154 struct menu menu_gpt = {
 155         .callback = gpt_menu_cb,
 156         .label = FDISK_DISKLABEL_GPT,
 157         .entries = {
 158                 MENU_XSEP(N_("GPT")),
 159                 MENU_XENT('i', N_("change disk GUID")),
 160                 MENU_XENT('n', N_("change partition name")),
 161                 MENU_XENT('u', N_("change partition UUID")),
 162                 MENU_XENT('M', N_("enter protective/hybrid MBR")),
 163
 164                 MENU_XSEP(""),
 165                 MENU_XENT('A', N_("toggle the legacy BIOS bootable flag")),
 166                 MENU_XENT('B', N_("toggle the no block IO protocol flag")),
 167                 MENU_XENT('R', N_("toggle the required partition flag")),
 168                 MENU_XENT('S', N_("toggle the GUID specific bits")),
 169
 170                 { 0, NULL }
 171         }
 172 };
 173
 174 struct menu menu_sun = {
 175         .callback = sun_menu_cb,
 176         .label = FDISK_DISKLABEL_SUN,
 177         .entries = {
 178                 MENU_BSEP(N_("Sun")),
 179                 MENU_ENT('a', N_("toggle the read-only flag")),
 180                 MENU_ENT('c', N_("toggle the mountable flag")),
 181
 182                 MENU_XENT('a', N_("change number of alternate cylinders")),
 183                 MENU_XENT('e', N_("change number of extra sectors per cylinder")),
 184                 MENU_XENT('i', N_("change interleave factor")),
 185                 MENU_XENT('o', N_("change rotation speed (rpm)")),
 186                 MENU_XENT('y', N_("change number of physical cylinders")),
 187                 { 0, NULL }
 188         }
 189 };
 190
 191 struct menu menu_sgi = {
 192         .callback = sgi_menu_cb,
 193         .label = FDISK_DISKLABEL_SGI,
 194         .entries = {
 195                 MENU_SEP(N_("SGI")),
 196                 MENU_ENT('a', N_("select bootable partition")),
 197                 MENU_ENT('b', N_("edit bootfile entry")),
 198                 MENU_ENT('c', N_("select sgi swap partition")),
 199                 MENU_ENT('i', N_("create SGI info")),
 200                 { 0, NULL }
 201         }
 202 };
 203
 204 struct menu menu_dos = {
 205         .callback = dos_menu_cb,
 206         .label = FDISK_DISKLABEL_DOS,
 207         .entries = {
 208                 MENU_BSEP(N_("DOS (MBR)")),
 209                 MENU_ENT('a', N_("toggle a bootable flag")),
 210                 MENU_ENT('b', N_("edit nested BSD disklabel")),
 211                 MENU_ENT('c', N_("toggle the dos compatibility flag")),
 212
 213                 MENU_XENT('b', N_("move beginning of data in a partition")),
 214                 MENU_XENT('i', N_("change the disk identifier")),
 215
 216                 MENU_XENT_NEST('M', N_("return from protective/hybrid MBR to GPT"),
 217                                         FDISK_DISKLABEL_DOS, FDISK_DISKLABEL_GPT),
 218                 { 0, NULL }
 219         }
 220 };
 221
 222 struct menu menu_bsd = {
 223         .callback = bsd_menu_cb,
 224         .label = FDISK_DISKLABEL_BSD,
 225         .entries = {
 226                 MENU_SEP(N_("BSD")),
 227                 MENU_ENT('e', N_("edit drive data")),
 228                 MENU_ENT('i', N_("install bootstrap")),
 229                 MENU_ENT('s', N_("show complete disklabel")),
 230                 MENU_ENT('x', N_("link BSD partition to non-BSD partition")),
 231                 { 0, NULL }
 232         }
 233 };
 234
 235 static const struct menu *menus[] = {
 236         &menu_gpt,
 237         &menu_sun,
 238         &menu_sgi,
 239         &menu_dos,
 240         &menu_bsd,
 241         &menu_geo,
 242         &menu_generic,
 243         &menu_createlabel,
 244 };
 245
 246 static const struct menu_entry *next_menu_entry(
 247                         struct fdisk_context *cxt,
 248                         struct menu_context *mc)
 249 {
 250         while (mc->menu_idx < ARRAY_SIZE(menus)) {
 251                 const struct menu *m = menus[mc->menu_idx];
 252                 const struct menu_entry *e = &(m->entries[mc->entry_idx]);
 253
 254                 /*
 255                  * whole-menu filter
 256                  */
 257
 258                 /* no more entries */
 259                 if (e->title == NULL ||
 260                 /* menu wanted for specified labels only */
 261                     (m->label && cxt->label && !(m->label & cxt->label->id)) ||
 262                 /* unwanted for nested PT */
 263                     (m->nonested && cxt->parent) ||
 264                 /* menu excluded for specified labels */
 265                     (m->exclude && cxt->label && (m->exclude & cxt->label->id))) {
 266                         mc->menu_idx++;
 267                         mc->entry_idx = 0;
 268                         continue;
 269                 }
 270
 271                 /*
 272                  * per entry filter
 273                  */
 274
 275                 /* excluded for the current label */
 276                 if ((e->exclude && cxt->label && e->exclude & cxt->label->id) ||
 277                 /* entry wanted for specified labels only */
 278                     (e->label && cxt->label && !(e->label & cxt->label->id)) ||
 279                 /* exclude non-expert entries in expect mode */
 280                     (e->expert == 0 && fdisk_context_display_details(cxt)) ||
 281                 /* nested only */
 282                     (e->parent && (!cxt->parent || cxt->parent->label->id != e->parent)) ||
 283                 /* exclude non-normal entries in normal mode */
 284                     (e->normal == 0 && !fdisk_context_display_details(cxt))) {
 285
 286                         mc->entry_idx++;
 287                         continue;
 288                 }
 289                 mc->entry_idx++;
 290                 return e;
 291
 292         }
 293         return NULL;
 294 }
 295
 296 /* returns @menu and menu entry for then @key */
 297 static const struct menu_entry *get_fdisk_menu_entry(
 298                 struct fdisk_context *cxt,
 299                 int key,
 300                 const struct menu **menu)
 301 {
 302         struct menu_context mc = MENU_CXT_EMPTY;
 303         const struct menu_entry *e;
 304
 305         while ((e = next_menu_entry(cxt, &mc))) {
 306                 if (IS_MENU_SEP(e) || e->key != key)
 307                         continue;
 308
 309                 if (menu)
 310                         *menu = menus[mc.menu_idx];
 311                 return e;
 312         }
 313
 314         return NULL;
 315 }
 316
 317 static int menu_detect_collisions(struct fdisk_context *cxt)
 318 {
 319         struct menu_context mc = MENU_CXT_EMPTY;
 320         const struct menu_entry *e, *r;
 321
 322         while ((e = next_menu_entry(cxt, &mc))) {
 323                 if (IS_MENU_SEP(e))
 324                         continue;
 325
 326                 r = get_fdisk_menu_entry(cxt, e->key, NULL);
 327                 if (!r) {
 328                         DBG(FRONTEND, ul_debug("warning: not found "
 329                                         "entry for %c", e->key));
 330                         return -1;
 331                 }
 332                 if (r != e) {
 333                         DBG(FRONTEND, ul_debug("warning: duplicate key '%c'",
 334                                                 e->key));
 335                         DBG(FRONTEND, ul_debug("       : %s", e->title));
 336                         DBG(FRONTEND, ul_debug("       : %s", r->title));
 337                         abort();
 338                 }
 339         }
 340
 341         return 0;
 342 }
 343
 344 static int print_fdisk_menu(struct fdisk_context *cxt)
 345 {
 346         struct menu_context mc = MENU_CXT_EMPTY;
 347         const struct menu_entry *e;
 348
 349         ON_DBG(FRONTEND, menu_detect_collisions(cxt));
 350
 351         if (fdisk_context_display_details(cxt))
 352                 printf(_("\nHelp (expert commands):\n"));
 353         else
 354                 printf(_("\nHelp:\n"));
 355
 356         while ((e = next_menu_entry(cxt, &mc))) {
 357                 if (IS_MENU_HID(e))
 358                         continue;       /* hidden entry */
 359                 if (IS_MENU_SEP(e) && (!e->title || !*e->title))
 360                         printf("\n");
 361                 else if (IS_MENU_SEP(e)) {
 362                         color_scheme_enable("help-title", UL_COLOR_BOLD);
 363                         printf("\n  %s\n", _(e->title));
 364                         color_disable();
 365                 } else
 366                         printf("   %c   %s\n", e->key, _(e->title));
 367         }
 368         fputc('\n', stdout);
 369
 370         if (cxt->parent)
 371                 fdisk_info(cxt, _("You're editing nested '%s' partition table, "
 372                                   "primary partition table is '%s'."),
 373                                 cxt->label->name,
 374                                 cxt->parent->label->name);
 375
 376         return 0;
 377 }
 378
 379 /* Asks for command, verify the key and perform the command or
 380  * returns the command key if no callback for the command is
 381  * implemented.
 382  *
 383  * Note that this function might exchange the context pointer to
 384  * switch to another (nested) context.
 385  *
 386  * Returns: <0 on error
 387  *           0 on success (the command performed)
 388  *          >0 if no callback (then returns the key)
 389  */
 390 int process_fdisk_menu(struct fdisk_context **cxt0)
 391 {
 392         struct fdisk_context *cxt = *cxt0;
 393         const struct menu_entry *ent;
 394         const struct menu *menu;
 395         int key, rc;
 396         const char *prompt;
 397         char buf[BUFSIZ];
 398
 399         if (fdisk_context_display_details(cxt))
 400                 prompt = _("Expert command (m for help): ");
 401         else
 402                 prompt = _("Command (m for help): ");
 403
 404         fputc('\n',stdout);
 405         rc = get_user_reply(cxt, prompt, buf, sizeof(buf));
 406         if (rc)
 407                 return rc;
 408
 409         key = buf[0];
 410         ent = get_fdisk_menu_entry(cxt, key, &menu);
 411         if (!ent) {
 412                 fdisk_warnx(cxt, _("%c: unknown command"), key);
 413                 return -EINVAL;
 414         }
 415
 416         rc = 0;
 417         DBG(FRONTEND, ul_debug("selected: key=%c, entry='%s'",
 418                                 key, ent->title));
 419
 420         /* menu has implemented callback, use it */
 421         if (menu->callback)
 422                 rc = menu->callback(cxt0, menu, ent);
 423         else {
 424                 DBG(FRONTEND, ul_debug("no callback for key '%c'", key));
 425                 rc = -EINVAL;
 426         }
 427
 428         DBG(FRONTEND, ul_debug("process menu done [rc=%d]", rc));
 429         return rc;
 430 }
 431
 432 /*
 433  * Basic fdisk actions
 434  */
 435 static int generic_menu_cb(struct fdisk_context **cxt0,
 436                        const struct menu *menu __attribute__((__unused__)),
 437                        const struct menu_entry *ent)
 438 {
 439         struct fdisk_context *cxt = *cxt0;
 440         int rc = 0;
 441         size_t n;
 442
 443         /* actions shared between expert and normal mode */
 444         switch (ent->key) {
 445         case 'p':
 446                 list_disk_geometry(cxt);
 447                 list_disklabel(cxt);
 448                 break;
 449         case 'w':
 450                 if (fdisk_context_is_readonly(cxt)) {
 451                         fdisk_warnx(cxt, _("Device open in read-only mode."));
 452                         break;
 453                 }
 454                 rc = fdisk_write_disklabel(cxt);
 455                 if (rc)
 456                         err(EXIT_FAILURE, _("failed to write disklabel"));
 457                 if (cxt->parent)
 458                         break; /* nested PT, don't leave */
 459                 fdisk_info(cxt, _("The partition table has been altered."));
 460                 rc = fdisk_reread_partition_table(cxt);
 461                 if (!rc)
 462                         rc = fdisk_context_deassign_device(cxt);
 463                 /* fallthrough */
 464         case 'q':
 465                 fdisk_free_context(cxt);
 466                 fputc('\n', stdout);
 467                 exit(rc == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
 468         case 'm':
 469                 rc = print_fdisk_menu(cxt);
 470                 break;
 471         case 'v':
 472                 rc = fdisk_verify_disklabel(cxt);
 473                 break;
 474         }
 475
 476         /* expert mode */
 477         if (ent->expert) {
 478                 switch (ent->key) {
 479                 case 'd':
 480                         dump_firstsector(cxt);
 481                         break;
 482                 case 'D':
 483                         dump_disklabel(cxt);
 484                         break;
 485                 case 'f':
 486                         rc = fdisk_reorder_partitions(cxt);
 487                         break;
 488                 case 'r':
 489                         rc = fdisk_context_enable_details(cxt, 0);
 490                         break;
 491                 }
 492                 return rc;
 493         }
 494
 495         /* normal mode */
 496         switch (ent->key) {
 497         case 'd':
 498                 rc = fdisk_ask_partnum(cxt, &n, FALSE);
 499                 if (!rc)
 500                         rc = fdisk_delete_partition(cxt, n);
 501                 if (rc)
 502                         fdisk_warnx(cxt, _("Could not delete partition %zu"), n + 1);
 503                 else
 504                         fdisk_info(cxt, _("Partition %zu has been deleted."), n + 1);
 505                 break;
 506         case 'l':
 507                 list_partition_types(cxt);
 508                 break;
 509         case 'n':
 510                 rc = fdisk_add_partition(cxt, NULL);
 511                 break;
 512         case 't':
 513                 change_partition_type(cxt);
 514                 break;
 515         case 'u':
 516                 fdisk_context_set_unit(cxt,
 517                         fdisk_context_use_cylinders(cxt) ? "sectors" :
 518                                                            "cylinders");
 519                 if (fdisk_context_use_cylinders(cxt))
 520                         fdisk_info(cxt, _("Changing display/entry units to cylinders (DEPRECATED!)."));
 521                 else
 522                         fdisk_info(cxt, _("Changing display/entry units to sectors."));
 523                 break;
 524         case 'x':
 525                 fdisk_context_enable_details(cxt, 1);
 526                 break;
 527         case 'r':
 528                 /* return from nested BSD to DOS */
 529                 if (cxt->parent) {
 530                         *cxt0 = cxt->parent;
 531
 532                         fdisk_info(cxt, _("Leaving nested disklabel."));
 533                         fdisk_free_context(cxt);
 534                         cxt = *cxt0;
 535                 }
 536                 break;
 537         }
 538
 539         return rc;
 540 }
 541
 542
 543 /*
 544  * This is fdisk frontend for GPT specific libfdisk functions that
 545  * are not expported by generic libfdisk API.
 546  */
 547 static int gpt_menu_cb(struct fdisk_context **cxt0,
 548                        const struct menu *menu __attribute__((__unused__)),
 549                        const struct menu_entry *ent)
 550 {
 551         struct fdisk_context *cxt = *cxt0;
 552         struct fdisk_context *mbr;
 553         size_t n;
 554         int rc = 0;
 555
 556         assert(cxt);
 557         assert(ent);
 558         assert(fdisk_is_disklabel(cxt, GPT));
 559
 560         DBG(FRONTEND, ul_debug("enter GPT menu"));
 561
 562         if (ent->expert) {
 563                 switch (ent->key) {
 564                 case 'i':
 565                         return fdisk_set_disklabel_id(cxt);
 566                 case 'M':
 567                         mbr = fdisk_new_nested_context(cxt, "dos");
 568                         if (!mbr)
 569                                 return -ENOMEM;
 570                         *cxt0 = cxt = mbr;
 571                         fdisk_context_enable_details(cxt, 1);   /* keep us in expert mode */
 572                         fdisk_sinfo(cxt, FDISK_INFO_SUCCESS,
 573                                         _("Entering protective/hybrid MBR disklabel."));
 574                         return 0;
 575                 }
 576
 577                 /* actions where is necessary partnum */
 578                 rc = fdisk_ask_partnum(cxt, &n, FALSE);
 579                 if (rc)
 580                         return rc;
 581
 582                 switch(ent->key) {
 583                 case 'u':
 584                         rc = fdisk_gpt_partition_set_uuid(cxt, n);
 585                         break;
 586                 case 'n':
 587                         rc = fdisk_gpt_partition_set_name(cxt, n);
 588                         break;
 589                 case 'A':
 590                         rc = fdisk_partition_toggle_flag(cxt, n, GPT_FLAG_LEGACYBOOT);
 591                         break;
 592                 case 'B':
 593                         rc = fdisk_partition_toggle_flag(cxt, n, GPT_FLAG_NOBLOCK);
 594                         break;
 595                 case 'R':
 596                         rc = fdisk_partition_toggle_flag(cxt, n, GPT_FLAG_REQUIRED);
 597                         break;
 598                 case 'S':
 599                         rc = fdisk_partition_toggle_flag(cxt, n, GPT_FLAG_GUIDSPECIFIC);
 600                         break;
 601                 }
 602         }
 603         return rc;
 604 }
 605
 606
 607 /*
 608  * This is fdisk frontend for MBR specific libfdisk functions that
 609  * are not expported by generic libfdisk API.
 610  */
 611 static int dos_menu_cb(struct fdisk_context **cxt0,
 612                        const struct menu *menu __attribute__((__unused__)),
 613                        const struct menu_entry *ent)
 614 {
 615         struct fdisk_context *cxt = *cxt0;
 616         int rc = 0;
 617
 618         DBG(FRONTEND, ul_debug("enter DOS menu"));
 619
 620         if (!ent->expert) {
 621                 switch (ent->key) {
 622                 case 'a':
 623                 {
 624                         size_t n;
 625                         rc = fdisk_ask_partnum(cxt, &n, FALSE);
 626                         if (!rc)
 627                                 rc = fdisk_partition_toggle_flag(cxt, n, DOS_FLAG_ACTIVE);
 628                         break;
 629                 }
 630                 case 'b':
 631                 {
 632                         struct fdisk_context *bsd
 633                                         = fdisk_new_nested_context(cxt, "bsd");
 634                         if (!bsd)
 635                                 return -ENOMEM;
 636                         if (!fdisk_dev_has_disklabel(bsd))
 637                                 rc = fdisk_create_disklabel(bsd, "bsd");
 638                         if (rc)
 639                                 fdisk_free_context(bsd);
 640                         else {
 641                                 *cxt0 = cxt = bsd;
 642                                 fdisk_sinfo(cxt, FDISK_INFO_SUCCESS,
 643                                                 _("Entering nested BSD disklabel."));
 644                         }
 645                         break;
 646                 }
 647                 case 'c':
 648                         toggle_dos_compatibility_flag(cxt);
 649                         break;
 650                 }
 651                 return rc;
 652         }
 653
 654         /* expert mode */
 655         switch (ent->key) {
 656         case 'b':
 657         {
 658                 size_t n;
 659                 rc = fdisk_ask_partnum(cxt, &n, FALSE);
 660                 if (!rc)
 661                         rc = fdisk_dos_move_begin(cxt, n);
 662                 break;
 663         }
 664         case 'i':
 665                 rc = fdisk_set_disklabel_id(cxt);
 666                 break;
 667         case 'M':
 668                 /* return from nested MBR to GPT */
 669                 if (cxt->parent) {
 670                         *cxt0 = cxt->parent;
 671
 672                         fdisk_info(cxt, _("Leaving nested disklabel."));
 673                         fdisk_free_context(cxt);
 674                         cxt = *cxt0;
 675                 }
 676                 break;
 677         }
 678         return rc;
 679 }
 680
 681 static int sun_menu_cb(struct fdisk_context **cxt0,
 682                        const struct menu *menu __attribute__((__unused__)),
 683                        const struct menu_entry *ent)
 684 {
 685         struct fdisk_context *cxt = *cxt0;
 686         int rc = 0;
 687
 688         DBG(FRONTEND, ul_debug("enter SUN menu"));
 689
 690         assert(cxt);
 691         assert(ent);
 692         assert(fdisk_is_disklabel(cxt, SUN));
 693
 694         DBG(FRONTEND, ul_debug("enter SUN menu"));
 695
 696         /* normal mode */
 697         if (!ent->expert) {
 698                 size_t n;
 699
 700                 rc = fdisk_ask_partnum(cxt, &n, FALSE);
 701                 if (rc)
 702                         return rc;
 703                 switch (ent->key) {
 704                 case 'a':
 705                         rc = fdisk_partition_toggle_flag(cxt, n, SUN_FLAG_RONLY);
 706                         break;
 707                 case 'c':
 708                         rc = fdisk_partition_toggle_flag(cxt, n, SUN_FLAG_UNMNT);
 709                         break;
 710                 }
 711                 return rc;
 712         }
 713
 714         /* expert mode */
 715         switch (ent->key) {
 716         case 'a':
 717                 rc = fdisk_sun_set_alt_cyl(cxt);
 718                 break;
 719         case 'e':
 720                 rc = fdisk_sun_set_xcyl(cxt);
 721                 break;
 722         case 'i':
 723                 rc = fdisk_sun_set_ilfact(cxt);
 724                 break;
 725         case 'o':
 726                 rc = fdisk_sun_set_rspeed(cxt);
 727                 break;
 728         case 'y':
 729                 rc = fdisk_sun_set_pcylcount(cxt);
 730                 break;
 731         }
 732         return rc;
 733 }
 734
 735 static int sgi_menu_cb(struct fdisk_context **cxt0,
 736                        const struct menu *menu __attribute__((__unused__)),
 737                        const struct menu_entry *ent)
 738 {
 739         struct fdisk_context *cxt = *cxt0;
 740         int rc = -EINVAL;
 741         size_t n = 0;
 742
 743         DBG(FRONTEND, ul_debug("enter SGI menu"));
 744
 745         assert(cxt);
 746         assert(ent);
 747         assert(fdisk_is_disklabel(cxt, SGI));
 748
 749         if (ent->expert)
 750                 return rc;
 751
 752         switch (ent->key) {
 753         case 'a':
 754                 rc = fdisk_ask_partnum(cxt, &n, FALSE);
 755                 if (!rc)
 756                         rc = fdisk_partition_toggle_flag(cxt, n, SGI_FLAG_BOOT);
 757                 break;
 758         case 'b':
 759                 fdisk_sgi_set_bootfile(cxt);
 760                 break;
 761         case 'c':
 762                 rc = fdisk_ask_partnum(cxt, &n, FALSE);
 763                 if (!rc)
 764                         rc = fdisk_partition_toggle_flag(cxt, n, SGI_FLAG_SWAP);
 765                 break;
 766         case 'i':
 767                 rc = fdisk_sgi_create_info(cxt);
 768                 break;
 769         }
 770
 771         return rc;
 772 }
 773
 774 /*
 775  * This is fdisk frontend for BSD specific libfdisk functions that
 776  * are not expported by generic libfdisk API.
 777  */
 778 static int bsd_menu_cb(struct fdisk_context **cxt0,
 779                        const struct menu *menu __attribute__((__unused__)),
 780                        const struct menu_entry *ent)
 781 {
 782         struct fdisk_context *cxt = *cxt0;
 783         int rc = 0, org;
 784
 785         assert(cxt);
 786         assert(ent);
 787         assert(fdisk_is_disklabel(cxt, BSD));
 788
 789         DBG(FRONTEND, ul_debug("enter BSD menu"));
 790
 791         switch(ent->key) {
 792         case 'e':
 793                 rc = fdisk_bsd_edit_disklabel(cxt);
 794                 break;
 795         case 'i':
 796                 rc = fdisk_bsd_write_bootstrap(cxt);
 797                 break;
 798         case 's':
 799                 org = fdisk_context_display_details(cxt);
 800
 801                 fdisk_context_enable_details(cxt, 1);
 802                 list_disklabel(cxt);
 803                 fdisk_context_enable_details(cxt, org);
 804                 break;
 805         case 'x':
 806                 rc = fdisk_bsd_link_partition(cxt);
 807                 break;
 808         }
 809         return rc;
 810 }
 811
 812 /* C/H/S commands */
 813 static int geo_menu_cb(struct fdisk_context **cxt0,
 814                        const struct menu *menu __attribute__((__unused__)),
 815                        const struct menu_entry *ent)
 816 {
 817         struct fdisk_context *cxt = *cxt0;
 818         int rc = -EINVAL;
 819         uintmax_t c = 0, h = 0, s = 0;
 820
 821         DBG(FRONTEND, ul_debug("enter GEO menu"));
 822
 823         assert(cxt);
 824         assert(ent);
 825
 826         switch (ent->key) {
 827         case 'c':
 828                 rc =  fdisk_ask_number(cxt, 1, cxt->geom.cylinders,
 829                                 1048576, _("Number of cylinders"), &c);
 830                 break;
 831         case 'h':
 832                 rc =  fdisk_ask_number(cxt, 1, cxt->geom.heads,
 833                                 256, _("Number of heads"), &h);
 834                 break;
 835         case 's':
 836                 rc =  fdisk_ask_number(cxt, 1, cxt->geom.sectors,
 837                                 63, _("Number of sectors"), &s);
 838                 break;
 839         }
 840
 841         if (!rc)
 842                 fdisk_override_geometry(cxt, c, h, s);
 843         return rc;
 844 }
 845
 846 static int createlabel_menu_cb(struct fdisk_context **cxt0,
 847                        const struct menu *menu __attribute__((__unused__)),
 848                        const struct menu_entry *ent)
 849 {
 850         struct fdisk_context *cxt = *cxt0;
 851         int rc = -EINVAL;
 852
 853         DBG(FRONTEND, ul_debug("enter Create label menu"));
 854
 855         assert(cxt);
 856         assert(ent);
 857
 858         if (ent->expert) {
 859                 switch (ent->key) {
 860                 case 'g':
 861                         /* Deprecated, use 'G' in main menu, just for backward
 862                          * compatibility only. */
 863                         rc = fdisk_create_disklabel(cxt, "sgi");
 864                         break;
 865                 }
 866                 return rc;
 867         }
 868
 869         switch (ent->key) {
 870                 case 'g':
 871                         fdisk_create_disklabel(cxt, "gpt");
 872                         break;
 873                 case 'G':
 874                         fdisk_create_disklabel(cxt, "sgi");
 875                         break;
 876                 case 'o':
 877                         fdisk_create_disklabel(cxt, "dos");
 878                         break;
 879                 case 's':
 880                         fdisk_create_disklabel(cxt, "sun");
 881                         break;
 882         }
 883         return rc;
 884 }